| /* |
| * Copyright 1999-2015 dangdang.com. |
| * <p> |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * </p> |
| */ |
| |
| package io.elasticjob.cloud.scheduler.ha; |
| |
| import io.elasticjob.cloud.reg.base.CoordinatorRegistryCenter; |
| import com.google.common.base.Optional; |
| import com.google.common.base.Strings; |
| import lombok.RequiredArgsConstructor; |
| |
| /** |
| * FrameworkID 的保存器. |
| * |
| * @author gaohongtao |
| */ |
| @RequiredArgsConstructor |
| public final class FrameworkIDService { |
| |
| private final CoordinatorRegistryCenter regCenter; |
| |
| /** |
| * 获取FrameworkID,返回值是一个可选的结果. |
| * |
| * @return 获取FrameworkID的可选结果 |
| */ |
| public Optional<String> fetch() { |
| String frameworkId = regCenter.getDirectly(HANode.FRAMEWORK_ID_NODE); |
| return Strings.isNullOrEmpty(frameworkId) ? Optional.<String>absent() : Optional.of(frameworkId); |
| } |
| |
| /** |
| * 保存FrameworkID. |
| * |
| * @param id Framework的ID |
| */ |
| public void save(final String id) { |
| if (!regCenter.isExisted(HANode.FRAMEWORK_ID_NODE)) { |
| regCenter.persist(HANode.FRAMEWORK_ID_NODE, id); |
| } |
| } |
| } |